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/* packet-ipxwan.c
* Routines for NetWare IPX WAN Protocol
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/unit_strings.h>
#include "packet-ipx.h"
void proto_register_ipxwan(void);
void proto_reg_handoff_ipxwan(void);
static dissector_handle_t ipxwan_handle;
/*
* See RFC 1362 for version 1 of this protocol; see the NetWare Link
* Services Protocol Specification, chapter 3, for version 2.
*/
static int proto_ipxwan;
static int hf_ipxwan_identifier;
static int hf_ipxwan_packet_type;
static int hf_ipxwan_node_id;
static int hf_ipxwan_sequence_number;
static int hf_ipxwan_num_options;
static int hf_ipxwan_option_num;
static int hf_ipxwan_accept_option;
static int hf_ipxwan_option_data_len;
static int hf_ipxwan_routing_type;
static int hf_ipxwan_wan_link_delay;
static int hf_ipxwan_common_network_number;
static int hf_ipxwan_router_name;
static int hf_ipxwan_delay;
static int hf_ipxwan_throughput;
static int hf_ipxwan_request_size;
static int hf_ipxwan_delta_time;
static int hf_ipxwan_extended_node_id;
static int hf_ipxwan_node_number;
static int hf_ipxwan_compression_type;
static int hf_ipxwan_compression_options;
static int hf_ipxwan_compression_slots;
static int hf_ipxwan_compression_parameters;
static int hf_ipxwan_padding;
static int hf_ipxwan_option_value;
static int ett_ipxwan;
static int ett_ipxwan_option;
static expert_field ei_ipxwan_option_data_len;
static const value_string ipxwan_packet_type_vals[] = {
{ 0, "Timer Request" },
{ 1, "Timer Response" },
{ 2, "Information Request" },
{ 3, "Information Response" },
{ 4, "Throughput Request" },
{ 5, "Throughput Response" },
{ 6, "Delay Request" },
{ 7, "Delay Response" },
{ 0xFF, "NAK" },
{ 0, NULL }
};
#define OPT_ROUTING_TYPE 0x00
#define OPT_RIP_SAP_INFO_EXCHANGE 0x01
#define OPT_NLSP_INFORMATION 0x02
#define OPT_NLSP_RAW_THROUGHPUT_DATA 0x03
#define OPT_EXTENDED_NODE_ID 0x04
#define OPT_NODE_NUMBER 0x05
#define OPT_COMPRESSION 0x80
#define OPT_PAD 0xFF
static const value_string ipxwan_option_num_vals[] = {
{ OPT_ROUTING_TYPE, "Routing Type" },
{ OPT_RIP_SAP_INFO_EXCHANGE, "RIP/SAP Info Exchange" },
{ OPT_NLSP_INFORMATION, "NLSP Information" },
{ OPT_NLSP_RAW_THROUGHPUT_DATA, "NLSP Raw Throughput Data" },
{ OPT_EXTENDED_NODE_ID, "Extended Node ID" },
{ OPT_NODE_NUMBER, "Node Number" },
{ OPT_COMPRESSION, "Compression" },
{ OPT_PAD, "Pad" },
{ 0, NULL }
};
static const value_string ipxwan_accept_option_vals[] = {
{ 0, "No" },
{ 1, "Yes" },
{ 3, "Not Applicable" },
{ 0, NULL }
};
static const value_string ipxwan_routing_type_vals[] = {
{ 0, "RIP" },
{ 1, "NLSP" },
{ 2, "Unnumbered RIP" },
{ 3, "On-demand, static routing" },
{ 4, "Client-router connection" },
{ 0, NULL }
};
#define COMP_TYPE_TELEBIT 0
static const value_string ipxwan_compression_type_vals[] = {
{ COMP_TYPE_TELEBIT, "Telebit" },
{ 0, NULL }
};
static int
dissect_ipxwan(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *ipxwan_tree = NULL;
int offset = 0;
uint8_t packet_type;
uint8_t num_options;
uint8_t option_number;
proto_tree *option_tree;
uint16_t option_data_len;
uint8_t compression_type;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPX WAN");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_ipxwan, tvb, 0, -1,
ENC_NA);
ipxwan_tree = proto_item_add_subtree(ti, ett_ipxwan);
proto_tree_add_item(ipxwan_tree, hf_ipxwan_identifier, tvb,
offset, 4, ENC_ASCII);
offset += 4;
packet_type = tvb_get_uint8(tvb, offset);
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(packet_type, ipxwan_packet_type_vals,
"Unknown packet type %u"));
proto_tree_add_uint(ipxwan_tree, hf_ipxwan_packet_type, tvb,
offset, 1, packet_type);
offset += 1;
proto_tree_add_item(ipxwan_tree, hf_ipxwan_node_id, tvb,
offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(ipxwan_tree, hf_ipxwan_sequence_number, tvb,
offset, 1, ENC_BIG_ENDIAN);
offset += 1;
num_options = tvb_get_uint8(tvb, offset);
proto_tree_add_uint(ipxwan_tree, hf_ipxwan_num_options, tvb,
offset, 1, num_options);
offset += 1;
while (num_options != 0) {
option_number = tvb_get_uint8(tvb, offset);
option_tree = proto_tree_add_subtree_format(ipxwan_tree, tvb, offset, -1,
ett_ipxwan_option, &ti, "Option: %s",
val_to_str(option_number, ipxwan_option_num_vals,
"Unknown (%u)"));
proto_tree_add_uint(option_tree, hf_ipxwan_option_num,
tvb, offset, 1, option_number);
offset += 1;
proto_tree_add_item(option_tree, hf_ipxwan_accept_option,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
option_data_len = tvb_get_ntohs(tvb, offset);
proto_tree_add_uint(option_tree, hf_ipxwan_option_data_len,
tvb, offset, 2, option_data_len);
offset += 2;
proto_item_set_len(ti, option_data_len+4);
switch (option_number) {
case OPT_ROUTING_TYPE:
if (option_data_len != 1) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be 1", option_data_len);
} else {
proto_tree_add_item(option_tree,
hf_ipxwan_routing_type, tvb,
offset, 1, ENC_BIG_ENDIAN);
}
break;
case OPT_RIP_SAP_INFO_EXCHANGE:
if (option_data_len != 54) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be 54", option_data_len);
} else {
proto_tree_add_item(option_tree,
hf_ipxwan_wan_link_delay, tvb,
offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(option_tree,
hf_ipxwan_common_network_number,
tvb, offset+2, 4, ENC_NA);
proto_tree_add_item(option_tree,
hf_ipxwan_router_name, tvb,
offset+6, 48, ENC_ASCII);
}
break;
case OPT_NLSP_INFORMATION:
if (option_data_len != 8) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be 8", option_data_len);
} else {
proto_tree_add_item(option_tree,
hf_ipxwan_delay, tvb,
offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(option_tree,
hf_ipxwan_throughput, tvb,
offset, 4, ENC_BIG_ENDIAN);
}
break;
case OPT_NLSP_RAW_THROUGHPUT_DATA:
if (option_data_len != 8) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be 8", option_data_len);
} else {
proto_tree_add_item(option_tree,
hf_ipxwan_request_size, tvb,
offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(option_tree,
hf_ipxwan_delta_time, tvb,
offset, 4, ENC_BIG_ENDIAN);
}
break;
case OPT_EXTENDED_NODE_ID:
if (option_data_len != 4) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be 4", option_data_len);
} else {
proto_tree_add_item(option_tree,
hf_ipxwan_extended_node_id, tvb,
offset, 4, ENC_NA);
}
break;
case OPT_NODE_NUMBER:
if (option_data_len != 6) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be 6", option_data_len);
} else {
proto_tree_add_item(option_tree,
hf_ipxwan_node_number, tvb,
offset, 6, ENC_NA);
}
break;
case OPT_COMPRESSION:
if (option_data_len < 1) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be >= 1", option_data_len);
} else {
compression_type = tvb_get_uint8(tvb,
offset);
ti = proto_tree_add_uint(option_tree,
hf_ipxwan_compression_type, tvb,
offset, 1, compression_type);
switch (compression_type) {
case COMP_TYPE_TELEBIT:
if (option_data_len < 3) {
expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
"Bogus length: %u, should be >= 3", option_data_len);
} else {
proto_tree_add_item(option_tree, hf_ipxwan_compression_options,
tvb, offset+1, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(option_tree, hf_ipxwan_compression_slots,
tvb, offset+2, 1, ENC_BIG_ENDIAN);
}
break;
default:
proto_tree_add_item(option_tree, hf_ipxwan_compression_parameters,
tvb, offset+1, option_data_len-1, ENC_NA);
break;
}
}
break;
case OPT_PAD:
proto_tree_add_item(option_tree, hf_ipxwan_padding,
tvb, offset, option_data_len, ENC_NA);
break;
default:
proto_tree_add_item(option_tree, hf_ipxwan_option_value,
tvb, offset, option_data_len, ENC_NA);
break;
}
offset += option_data_len;
num_options--;
}
return tvb_captured_length(tvb);
}
void
proto_register_ipxwan(void)
{
static hf_register_info hf[] = {
{ &hf_ipxwan_identifier,
{ "Identifier", "ipxwan.identifier",
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_packet_type,
{ "Packet Type", "ipxwan.packet_type",
FT_UINT8, BASE_DEC, VALS(ipxwan_packet_type_vals), 0x0, NULL,
HFILL }},
{ &hf_ipxwan_node_id,
{ "Node ID", "ipxwan.node_id", FT_UINT32,
BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_sequence_number,
{ "Sequence Number", "ipxwan.sequence_number", FT_UINT8,
BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_num_options,
{ "Number of Options", "ipxwan.num_options", FT_UINT8,
BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_option_num,
{ "Option Number", "ipxwan.option_num", FT_UINT8,
BASE_HEX, VALS(ipxwan_option_num_vals), 0x0, NULL, HFILL }},
{ &hf_ipxwan_accept_option,
{ "Accept Option", "ipxwan.accept_option", FT_UINT8,
BASE_DEC, VALS(ipxwan_accept_option_vals), 0x0, NULL, HFILL }},
{ &hf_ipxwan_option_data_len,
{ "Option Data Length", "ipxwan.option_data_len", FT_UINT16,
BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_routing_type,
{ "Routing Type", "ipxwan.routing_type", FT_UINT8,
BASE_DEC, VALS(ipxwan_routing_type_vals), 0x0, NULL, HFILL }},
{ &hf_ipxwan_wan_link_delay,
{ "WAN Link Delay", "ipxwan.rip_sap_info_exchange.wan_link_delay",
FT_UINT16, BASE_DEC|BASE_UNIT_STRING, UNS(&units_milliseconds), 0x0, NULL, HFILL }},
{ &hf_ipxwan_common_network_number,
{ "Common Network Number", "ipxwan.rip_sap_info_exchange.common_network_number",
FT_IPXNET, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_router_name,
{ "Router Name", "ipxwan.rip_sap_info_exchange.router_name",
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_delay,
{ "Delay", "ipxwan.nlsp_information.delay",
FT_UINT32, BASE_DEC|BASE_UNIT_STRING, UNS(&units_microseconds), 0x0, NULL, HFILL }},
{ &hf_ipxwan_throughput,
{ "Throughput", "ipxwan.nlsp_information.throughput",
FT_UINT32, BASE_DEC|BASE_UNIT_STRING, UNS(&units_microseconds), 0x0, NULL, HFILL }},
{ &hf_ipxwan_request_size,
{ "Request Size", "ipxwan.nlsp_raw_throughput_data.request_size",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_delta_time,
{ "Delta Time", "ipxwan.nlsp_raw_throughput_data.delta_time",
FT_UINT32, BASE_DEC|BASE_UNIT_STRING, UNS(&units_microseconds), 0x0, NULL, HFILL }},
{ &hf_ipxwan_extended_node_id,
{ "Extended Node ID", "ipxwan.extended_node_id",
FT_IPXNET, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_node_number,
{ "Node Number", "ipxwan.node_number",
FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_compression_type,
{ "Compression Type", "ipxwan.compression.type",
FT_UINT8, BASE_DEC, VALS(ipxwan_compression_type_vals), 0x0,
NULL, HFILL }},
{ &hf_ipxwan_compression_options,
{ "Compression options", "ipxwan.compression.options",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipxwan_compression_slots,
{ "Number of compression slots", "ipxwan.compression.slots",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipxwan_compression_parameters,
{ "Option parameters", "ipxwan.compression.parameters",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_padding,
{ "Padding", "ipxwan.padding",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_ipxwan_option_value,
{ "Option value", "ipxwan.option_value",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
};
static int *ett[] = {
&ett_ipxwan,
&ett_ipxwan_option,
};
static ei_register_info ei[] = {
{ &ei_ipxwan_option_data_len, { "ipxwan.option_data_len.invalid", PI_MALFORMED, PI_ERROR, "Wrong length", EXPFILL }},
};
expert_module_t* expert_ipxwan;
proto_ipxwan = proto_register_protocol("IPX WAN", "IPX WAN", "ipxwan");
proto_register_field_array(proto_ipxwan, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_ipxwan = expert_register_protocol(proto_ipxwan);
expert_register_field_array(expert_ipxwan, ei, array_length(ei));
ipxwan_handle = register_dissector("ipxwan", dissect_ipxwan, proto_ipxwan);
}
void
proto_reg_handoff_ipxwan(void)
{
dissector_add_uint("ipx.socket", IPX_SOCKET_IPXWAN, ipxwan_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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